HANDBOOK OFADVANCED CERAMICS MACHINING EDITED 5 potx

[...]... Sk7 GOE91 Glass Ceramic 53 .1 59 .0 80.2 82.2 95. 8 TRC 5 (Glass II) 108.3 4.44 4.14 5. 62 5. 32 6.71 8.48 30.18 2.83 22 35. 63 1.98 24.1 45. 74 2.63 33.2 58 .20 2.62 32 .5 64.03 3.32 38.3 60.30 5. 02 45. 1 0.3 0.38 0.38 0.49 0.39 1 .56 0.22 3740 0.20 252 0 0.26 351 0 0. 25 255 0 0.20 2980 0.27 255 0 57 54 4 96 52 4 86 760 76 7 25 47 880 52 727 50 3 420 54 2 421 728 603 0.93 0.82 1.04 0.83 1.62 1.31 51 5 473 624 699 — 961 6... Glass II; TRC 5 AL2O3 ZrO2 SiC Si3N4 Hardness (H) (GPa) Density (kg mÀ3) Specific Heat (Cr) (j kgÀ1 kÀ1) Temperature Rise (T ) (K) 4.44 5. 62 4.14 6.71 5. 32 8.48 15. 2 12.8 10.6 9.2 255 0 252 0 3740 255 0 351 0 2980 3710 253 0 3100 250 0 54 4 760 52 4 880 7 25 727 1 050 821 1040 710 190.82 174. 95 1 25. 94 178.27 124.64 233.36 232.63 367.40 196.02 309.01 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001... Figure 1.11) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 15 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 15 TABLE 1.2 Estimated Data for Glasses Material Data KzF6 BK7 F6 SK7 GOE91 TRC 5 E=H R (Pa m) dci (nm) (Indentation) dcg (nm) (Grinding) 11.94 20.1 8.18 54 .5 14.27 25. 3 9.78 65. 2 14. 25 35. 5 18.33 120 15. 45 43.3 19.66 131 14.27 21.1... of TRC 5 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 13 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 13 TRC 5 Normal load (mN) 1 .5 1 0 .5 0 −0 .5 0 1 2 3 4 5 6 Time (sec) 7 8 9 10 1 2 3 4 5 6 Time (sec) 7 8 9 10 Scratching force (mN) 1 .5 1 0 .5 0 −0 .5 0 FIGURE 1.10 Force data measured during brittle scratching on surface of TRC 5, where... JSPE (in Japanese), 61, 10 (19 95) 1428; Lawn, B.R and Swain, M.V., Microfracture beneath point indentations in brittle solids, J Mater Sci, 10 (19 75) 113 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof Handbook of Advanced Ceramics Machining 10 0 d −4/3 40 30 20 0.02 0.04 0.06 0.08 0.1 0.12 d −4/3 (nm−4/3) (d) F6 Ductile removal zone 55 50 45 40 Brittle zone 40 0 74 72... temperature Tmax (°C) 250 200 150 F6 100 O BK7 SK7 O O KzF6 50 O GOE91 O O TRC 5 O AI203 0 0 5 10 15 20 25 Tangential force Ft (mN) FIGURE 1.17 The estimated maximum surface temperature rise vs the tangential grinding force for fixed experimental conditions Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 21 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine Tool... 3D-grinding zone Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 6 6.10.2006 2:05am Handbook of Advanced Ceramics Machining 6 In machining of brittle materials, it is generally known that ductile behavior is achieved when the specific material removal unit is small enough .5 The critical depth of cut dc is specified as dc ¼ 0: 15    E Kc 2 H H (1 :5) where E is Young’s modulus,... Japan Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xiii 18.10.2006 6:35pm Contents 1 Ductile Grinding of Ceramics: Machine Tool and Process 1 H Eda 2 Ductile-Mode Ultra-Smoothness Grinding of Fine Ceramics with Coarse-Grain-Size Diamond Wheels 29 H Yasui 3 Mechanisms for Grinding of Ceramics 55 S Malkin and T.W Hwang 4 Grinding of Ceramics with Attention... 0.1 0.12 Ductile removal zone (e) GOE91 m (Gj/m3) 60 45 78 Brittle–ductile transition Brittle zone 65 50 30 0.02 0.04 0.06 0.08 0.1 0.12 d −4/3 (nm−4/3) (b) KzF6 70 55 35 10 0 35 Brittle zone 0 m (Gj/m3) 50 Ductile removal zone 64 0.1 0.12 (nm−4/3) 60 Brittle–ductile transition m (Gj/m3) 60 66 65 Brittle zone 70 70 68 0.02 0.04 0.06 0.08 (a) TRC 5 72 Brittle–ductile transition 20 Ductile removal zone... about three times different The valley depth of ceramics is one digit larger than its centerline average roughness The tip angle 2a of the valley for each material is about 2a % 134 j 2a % 150  170 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C001 Final Proof page 5 6.10.2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 5 Vs Plastic flow Chip Grain Chipping Grain Vs . alt="" HANDBOOK OF ADVANCED CERAMICS MACHINING Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page i 18.10.2006 6:35pm Ioan. 6:35pm Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page ii 18.10.2006 6:35pm HANDBOOK OF ADVANCED CERAMICS MACHINING E DITED